1 # /* **************************************************************************
2 #  *                                                                          *
3 #  *     (C) Copyright Edward Diener 2011.                                    *
4 #  *     (C) Copyright Paul Mensonides 2011.                                  *
5 #  *     Distributed under the Boost Software License, Version 1.0. (See      *
6 #  *     accompanying file LICENSE_1_0.txt or copy at                         *
7 #  *     http://www.boost.org/LICENSE_1_0.txt)                                *
8 #  *                                                                          *
9 #  ************************************************************************** */
10 #
11 # /* See http://www.boost.org for most recent version. */
12 #
13 # ifndef BOOST_PREPROCESSOR_TUPLE_SIZE_HPP
14 # define BOOST_PREPROCESSOR_TUPLE_SIZE_HPP
15 #
16 # include <boost/preprocessor/cat.hpp>
17 # include <boost/preprocessor/config/config.hpp>
18 # include <boost/preprocessor/control/if.hpp>
19 # include <boost/preprocessor/variadic/has_opt.hpp>
20 # include <boost/preprocessor/variadic/size.hpp>
21 #
22 # if BOOST_PP_VARIADIC_HAS_OPT()
23 #     if BOOST_PP_VARIADICS_MSVC
24 #         define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_TUPLE_SIZE_CHECK(BOOST_PP_CAT(BOOST_PP_VARIADIC_SIZE tuple,))
25 #     else
26 #         define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_TUPLE_SIZE_CHECK(BOOST_PP_VARIADIC_SIZE tuple)
27 #     endif
28 #     define BOOST_PP_TUPLE_SIZE_CHECK(size) BOOST_PP_IF(size,size,1)
29 # elif BOOST_PP_VARIADICS_MSVC
30 #     define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_CAT(BOOST_PP_VARIADIC_SIZE tuple,)
31 # else
32 #     define BOOST_PP_TUPLE_SIZE(tuple) BOOST_PP_VARIADIC_SIZE tuple
33 # endif
34 #
35 # endif
36